Since Henry the IV, Isabella’s brother, never had a child, the opposition attempted to replace him with Afonso, her other brother. However, Afonso died before he could take the throne and the opposition's attempts to get Isabella to take his place failed. Since Isabella chose Henry’s side, he named her his heir. After becoming heir, in October 1469, Isabella married Ferdinand of Aragon, without Henry’s approval, which
Since Henry the IV, Isabella’s brother, never had a child, the opposition attempted to replace him with Afonso, her other brother. However, Afonso died before he could take the throne and the opposition's attempts to get Isabella to take his place failed. Since Isabella chose Henry’s side, he named her his heir. After becoming heir, in October 1469, Isabella married Ferdinand of Aragon, without Henry’s approval, which